Pat Leiggi (right) of the Museum of the Rockies prepares to move a leg bone of the T. rex at the Smithsonian's Natural History Museum in Washington, D.C., on Tuesday. Maggie Starbard/NPR hide caption

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A T. Rex Treks To Washington For A Shot At Fame

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Methane-Producing Microbes Caused 'The Great Dying'

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Courtesy of Bob Walters

The 500-Pound 'Chicken From Hell' Likely Ate Whatever It Wanted

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Magellanic penguins strut their stuff on the rocky shoreline of Argentina's Punta Tombo, home to the largest colony of the birds in the world. Craig Lovell/Corbis hide caption

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Changing Climate In Argentina Is Killing Penguin Chicks

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A close-up schematic of leaks near the U.S. Capitol shows high leak densities east of the building, but few leaks over the National Mall, where very few natural gas pipelines exist. Robert B. Jackson/Environmental Science and Technology hide caption

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Robert B. Jackson/Environmental Science and Technology

About 6,000 Natural Gas Leaks Found In D.C.'s Aging Pipes

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Ask not for whom the wolf stalks ... Holly Kuchera/iStockphoto hide caption

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Holly Kuchera/iStockphoto

When Big Carnivores Go Down, Even Vegetarians Take The Hit

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Say aaaaaah! Dental caries and other signs of oral disease are plain to see in the upper teeth of this hunter-gatherer, between 14,000 and 15,000 years old. The findings challenge the idea that the original paleo diet was inherently healthy, says paleo-anthropologist Louise Humphrey. It all depended, she says, on what wild foods were available. Courtesy of Isabelle De Groote hide caption

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Courtesy of Isabelle De Groote

Looks Like The Paleo Diet Wasn't Always So Hot For Ancient Teeth

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Even when a flood obliterates homes, as Superstorm Sandy did in 2012 in the Rockaway neighborhood of Queens, N.Y., the urge to rebuild can be strong. Spencer Platt/Getty Images hide caption

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Federal Flood Insurance Program Drowning In Debt. Who Will Pay?

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Florida's Mangroves Move North As Temperatures Rise

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In Jiaonan county, the Qi wall incorporates outcrops of bedrock. Linda Nicholas/The Field Museum hide caption

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Linda Nicholas/The Field Museum

Centuries Before China's 'Great Wall,' There Was Another

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The Brazilian agricultural sector exported for a value of $94,590 million in 2011. One of its largest exports is soybeans, like these in Cascavel, Parana. Werner Rudhart/DPA /Landov hide caption

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Werner Rudhart/DPA /Landov

More People Have More To Eat, But It's Not All Good News

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Research excavations like these in Siberia's Denisova Cave are yielding clues to the mating choices of early hominids. Bence Viola/Nature hide caption

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Bence Viola/Nature

Mixing It Up 50,000 Years Ago — Who Slept With Whom?

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Scientists Battle Over Fate Of Yellowstone's Grizzlies

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Sediment samples from the seafloor near Long Island. UT Austin Institute for Geophysics hide caption

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UT Austin Institute for Geophysics

Long Island Wins Ultimate Faceoff Against Hurricane Sandy

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The EPA tries to keep track of all sorts of methane producers — including herds of methane-belching cattle. Emmett Tullos/Flickr hide caption

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Emmett Tullos/Flickr

U.S. May Be Producing 50 Percent More Methane Than EPA Thinks

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